I know I am jumping the gun a little as we havent seen the exact implementation.
|Creative Character Build Collection and The Magic of King's and Heros also Can Martial Characters Fly?
Improvisation in 4e: Fave 4E Improvisations - also Wrecans Guides to improvisation beyond page 42
By virtue of being a player your characters are the protagonists in a heroic fantasy game even at level one
"Wizards and Warriors need abilities with explicit effects for opposite reasons. With the wizard its because you need to create artificial limits on them, they have no natural ones and for the Warrior you need to grant permission to do awesome."